Centuries: 9th century - 10th century - 11th century
Decades: 880s 890s 900s 910s 920s - 930s - 940s 950s 960s 970s 980s
Years: 928 929 930 931 932 - 933 - 934 935 936 937 938
Births
Deaths
... by the method of completing the square[?]. <math>ax^2+bx+c=0</math> Dividing our quadratic equation by a, we have <math> x^2 + \left( ...